It's actually not cruel... What would be cruel is perming, since perming has sooo many chemicals. They dyes used for dogs, is different than the dye for humans - it is a lot safer, especially since well....dogs lick themselves. It HAS to be safe, wet and dry. I dare you to lick human hair dye
you'd be sick!
What's cruel is dog fighting, beating, etc.
Although to me it looks weird xD I wouldn't do it. :3 But, some people do.However I saw a bichon or whatever dyed green...it looked stupid x.x
Keeshonds have that problem... double coat, you shave, they get patches back and mat more!